Ups Operating Instructions - Powerware 9390 Installation & Operation Manual

Chapter 9
The following procedures provide instructions for operating the UPS system. For a
description of the UPS control panel functions, see Chapter 8, "Using the Control Panel."
9.1 Starting the UPS in Normal Mode
To start the UPS system, perform the following procedure:
Powerware 9390 UPS (40–80 kVA) Installation and Operation Manual S 164201535 Rev A
®

UPS Operating Instructions

NOTE Before starting the UPS ensure all installation tasks are complete and a
preliminary startup has been performed by authorized service personnel. The
preliminary startup verifies all electrical interconnections to ensure the installation
was successful and the UPS operates properly.
1. Close the UPS input feeder circuit breaker.
2. If the UPS is dual feed, close the UPS Bypass input feeder circuit breaker.
3. Observe the UPS control panel display becoming active, indicating logic power.
4. Press the CONTROLS pushbutton on the Main menu bar. The System Controls
screen appears.
5. On the System Controls screen, the Power Module (PM) status should indicate
SHUTDOWN.
6. Press the NORMAL pushbutton on the System Controls menu bar.
If Auto Bypass is enabled, the critical load is immediately supplied by the bypass
source, in Bypass mode, until the inverter turns on and the UPS transfers to
Normal mode. The status indicator on the UPS control panel indicates the UPS is
in Bypass mode. If Auto Bypass is not enabled, the UPS output remains off until
the UPS transfers to Normal mode.
7. Observe the following messages appear sequentially on the Power Module (PM)
status line:
DC STARTING
INVERTER STARTING
INVERTER SYNCING
READY
ONLINE
The rectifier and inverter turn on. When the inverter reaches full voltage, UPS
output contactor K3 closes and the static switch turns off supplying power to the
critical load in Normal mode. It takes approximately 1 minute for the UPS to
achieve Normal mode.
9-1